/*
- * Copyright (c) 2008-2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2008-2011 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <i386/machine_check.h>
#endif
-#if CONFIG_COUNTERS
-#include <pmc/pmc.h>
-#endif
-
-#if MACH_KDB
-#include <machine/db_machdep.h>
-#endif
-
#include <sys/kdebug.h>
#if MP_DEBUG
vm_map_offset_t lapic_vbase64;
/* Establish a map to the local apic */
- lapic_vbase64 = (vm_offset_t)vm_map_min(kernel_map);
- result = vm_map_find_space(kernel_map,
- &lapic_vbase64,
- round_page(LAPIC_SIZE), 0,
- VM_MAKE_TAG(VM_MEMORY_IOKIT), &entry);
- /* Convert 64-bit vm_map_offset_t to "pointer sized" vm_offset_t
- */
- lapic_vbase = (vm_offset_t) lapic_vbase64;
- if (result != KERN_SUCCESS) {
- panic("legacy_init: vm_map_find_entry FAILED (err=%d)", result);
+ if (lapic_vbase == 0) {
+ lapic_vbase64 = (vm_offset_t)vm_map_min(kernel_map);
+ result = vm_map_find_space(kernel_map,
+ &lapic_vbase64,
+ round_page(LAPIC_SIZE), 0,
+ VM_MAKE_TAG(VM_KERN_MEMORY_IOKIT), &entry);
+ /* Convert 64-bit vm_map_offset_t to "pointer sized" vm_offset_t
+ */
+ lapic_vbase = (vm_offset_t) lapic_vbase64;
+ if (result != KERN_SUCCESS) {
+ panic("legacy_init: vm_map_find_entry FAILED (err=%d)", result);
+ }
+ vm_map_unlock(kernel_map);
+
+ /*
+ * Map in the local APIC non-cacheable, as recommended by Intel
+ * in section 8.4.1 of the "System Programming Guide".
+ * In fact, this is redundant because EFI will have assigned an
+ * MTRR physical range containing the local APIC's MMIO space as
+ * UC and this will override the default PAT setting.
+ */
+ pmap_enter(pmap_kernel(),
+ lapic_vbase,
+ (ppnum_t) i386_btop(lapic_pbase),
+ VM_PROT_READ|VM_PROT_WRITE,
+ VM_PROT_NONE,
+ VM_WIMG_IO,
+ TRUE);
}
- vm_map_unlock(kernel_map);
-/* Map in the local APIC non-cacheable, as recommended by Intel
- * in section 8.4.1 of the "System Programming Guide".
- */
- pmap_enter(pmap_kernel(),
- lapic_vbase,
- (ppnum_t) i386_btop(lapic_pbase),
- VM_PROT_READ|VM_PROT_WRITE,
- VM_WIMG_IO,
- TRUE);
+
+ /*
+ * Set flat delivery model, logical processor id
+ * This should already be the default set.
+ */
+ LAPIC_WRITE(DFR, LAPIC_DFR_FLAT);
+ LAPIC_WRITE(LDR, (get_cpu_number()) << LAPIC_LDR_SHIFT);
}
*LAPIC_MMIO(reg) = value;
}
+static uint64_t
+legacy_read_icr(void)
+{
+ return (((uint64_t)*LAPIC_MMIO(ICRD)) << 32) | ((uint64_t)*LAPIC_MMIO(ICR));
+}
+
+static void
+legacy_write_icr(uint32_t dst, uint32_t cmd)
+{
+ *LAPIC_MMIO(ICRD) = dst << LAPIC_ICRD_DEST_SHIFT;
+ *LAPIC_MMIO(ICR) = cmd;
+}
+
static lapic_ops_table_t legacy_ops = {
legacy_init,
legacy_read,
- legacy_write
+ legacy_write,
+ legacy_read_icr,
+ legacy_write_icr
};
+static boolean_t is_x2apic = FALSE;
+
static void
x2apic_init(void)
{
+ uint32_t lo;
+ uint32_t hi;
+
+ rdmsr(MSR_IA32_APIC_BASE, lo, hi);
+ if ((lo & MSR_IA32_APIC_BASE_EXTENDED) == 0) {
+ lo |= MSR_IA32_APIC_BASE_EXTENDED;
+ wrmsr(MSR_IA32_APIC_BASE, lo, hi);
+ kprintf("x2APIC mode enabled\n");
+ }
}
static uint32_t
wrmsr(LAPIC_MSR(reg), value, 0);
}
+static uint64_t
+x2apic_read_icr(void)
+{
+ return rdmsr64(LAPIC_MSR(ICR));;
+}
+
+static void
+x2apic_write_icr(uint32_t dst, uint32_t cmd)
+{
+ wrmsr(LAPIC_MSR(ICR), cmd, dst);
+}
+
static lapic_ops_table_t x2apic_ops = {
x2apic_init,
x2apic_read,
- x2apic_write
+ x2apic_write,
+ x2apic_read_icr,
+ x2apic_write_icr
};
-
void
lapic_init(void)
{
uint32_t hi;
boolean_t is_boot_processor;
boolean_t is_lapic_enabled;
- boolean_t is_x2apic;
/* Examine the local APIC state */
rdmsr(MSR_IA32_APIC_BASE, lo, hi);
if (!is_boot_processor || !is_lapic_enabled)
panic("Unexpected local APIC state\n");
+ /*
+ * If x2APIC is available and not already enabled, enable it.
+ * Unless overriden by boot-arg.
+ */
+ if (!is_x2apic && (cpuid_features() & CPUID_FEATURE_x2APIC)) {
+ PE_parse_boot_argn("-x2apic", &is_x2apic, sizeof(is_x2apic));
+ kprintf("x2APIC supported %s be enabled\n",
+ is_x2apic ? "and will" : "but will not");
+ }
+
lapic_ops = is_x2apic ? &x2apic_ops : &legacy_ops;
- lapic_ops->init();
+ LAPIC_INIT();
+ kprintf("ID: 0x%x LDR: 0x%x\n", LAPIC_READ(ID), LAPIC_READ(LDR));
if ((LAPIC_READ(VERSION)&LAPIC_VERSION_MASK) < 0x14) {
panic("Local APIC version 0x%x, 0x14 or more expected\n",
(LAPIC_READ(VERSION)&LAPIC_VERSION_MASK));
/* Set up the lapic_id <-> cpu_number map and add this boot processor */
lapic_cpu_map_init();
lapic_cpu_map((LAPIC_READ(ID)>>LAPIC_ID_SHIFT)&LAPIC_ID_MASK, 0);
+ current_cpu_datap()->cpu_phys_number = cpu_to_lapic[0];
kprintf("Boot cpu local APIC id 0x%x\n", cpu_to_lapic[0]);
}
"Periodic",
"TSC-Deadline",
"Illegal"
- "Illegal"
};
void
LAPIC_READ(APR)&LAPIC_APR_MASK,
LAPIC_READ(PPR)&LAPIC_PPR_MASK);
kprintf("Destination Format 0x%x Logical Destination 0x%x\n",
- LAPIC_READ(DFR)>>LAPIC_DFR_SHIFT,
+ is_x2apic ? 0 : LAPIC_READ(DFR)>>LAPIC_DFR_SHIFT,
LAPIC_READ(LDR)>>LAPIC_LDR_SHIFT);
kprintf("%cEnabled %cFocusChecking SV 0x%x\n",
BOOL(LAPIC_READ(SVR)&LAPIC_SVR_ENABLE),
kprintf("\n");
}
-#if MACH_KDB
-/*
- * Displays apic junk
- *
- * da
- */
-void
-db_apic(__unused db_expr_t addr,
- __unused int have_addr,
- __unused db_expr_t count,
- __unused char *modif)
-{
-
- lapic_dump();
-
- return;
-}
-
-#endif
-
boolean_t
lapic_probe(void)
{
* Re-initialize cpu features info and re-check.
*/
cpuid_set_info();
+ /* We expect this codepath will never be traversed
+ * due to EFI enabling the APIC. Reducing the APIC
+ * interrupt base dynamically is not supported.
+ */
if (cpuid_features() & CPUID_FEATURE_APIC) {
printf("Local APIC discovered and enabled\n");
lapic_os_enabled = TRUE;
}
}
- /* Set flat delivery model, logical processor id */
- LAPIC_WRITE(DFR, LAPIC_DFR_FLAT);
- LAPIC_WRITE(LDR, (get_cpu_number()) << LAPIC_LDR_SHIFT);
-
/* Accept all */
LAPIC_WRITE(TPR, 0);
/*
* Configure TSC-deadline timer mode. The lapic interrupt is always unmasked.
*/
-__private_extern__
void
lapic_config_tsc_deadline_timer(void)
{
LAPIC_WRITE(TIMER_INITIAL_COUNT, initial_count);
}
-__private_extern__
void
lapic_set_tsc_deadline_timer(uint64_t deadline)
{
wrmsr64(MSR_IA32_TSC_DEADLINE, deadline);
}
-__private_extern__
uint64_t
lapic_get_tsc_deadline_timer(void)
{
break;
case LAPIC_PMC_SW_INTERRUPT:
{
-#if CONFIG_COUNTERS
- thread_t old, new;
- ml_get_csw_threads(&old, &new);
-
- if (pmc_context_switch(old, new) == TRUE) {
- retval = 1;
- /* No EOI required for SWI */
- }
-#endif /* CONFIG_COUNTERS */
}
break;
+ case LAPIC_KICK_INTERRUPT:
+ _lapic_end_of_interrupt();
+ retval = 1;
+ break;
}
return retval;
state = ml_set_interrupts_enabled(FALSE);
/* Wait for pending outgoing send to complete */
- while (LAPIC_READ(ICR) & LAPIC_ICR_DS_PENDING) {
+ while (LAPIC_READ_ICR() & LAPIC_ICR_DS_PENDING) {
cpu_pause();
}
- LAPIC_WRITE(ICRD, cpu_to_lapic[cpu] << LAPIC_ICRD_DEST_SHIFT);
- LAPIC_WRITE(ICR, vector | LAPIC_ICR_DM_FIXED);
+ LAPIC_WRITE_ICR(cpu_to_lapic[cpu], vector | LAPIC_ICR_DM_FIXED);
(void) ml_set_interrupts_enabled(state);
}
lvt_timer = LAPIC_READ(LVT_TIMER);
}
}
+
+/* SPI returning the CMCI vector */
+uint8_t
+lapic_get_cmci_vector(void)
+{
+ uint8_t cmci_vector = 0;
+#if CONFIG_MCA
+ /* CMCI, if available */
+ if (mca_is_cmci_present())
+ cmci_vector = LAPIC_VECTOR(CMCI);
+#endif
+ return cmci_vector;
+}
+
+#if DEBUG
+extern void lapic_trigger_MC(void);
+void
+lapic_trigger_MC(void)
+{
+ /* A 64-bit access to any register will do it. */
+ volatile uint64_t dummy = *(volatile uint64_t *) (volatile void *) LAPIC_MMIO(ID);
+ dummy++;
+}
+#endif
projects / apple / xnu.git / blobdiff